A useful cost indicator is the cost Performance Index (CPI) shown in Figure 6. Like the SPI, the CPI is calculated.

一个有用的成本指示器是成本执行索引(CPI)，如图6所示，CPI是被计算出来的。

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Current performance is best indicator of future performance and therefore using trend data it is possible to forecast cost or schedule overruns at quite an early stage in a project.

项目当前的执行情况是项目未来执行情况最好的指示器，因此在项目较早期使用项目动态数据可能预测项目的成本和时间安排是否超出预期。

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At the same time, its low-level design for the entire device down to this level of this indicator has made a major contribution to the final performance of a high economic cost.

同时，其低层本设计为整个设备降层本指标做出了贡献，最终经济上表现出较高性价比。

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